Rocket.Chat.ReactNative/app/lib/methods/helpers/random.ts

export function random(length: number): string {
	let text = '';
	const possible = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
	for (let i = 0; i < length; i += 1) {
		text += possible.charAt(Math.floor(Math.random() * possible.length));
	}
	return text;
}